Automatic traiireb-bbake



A. E; c. PARIS.

AUTOMATIC TRAILER BRAKE.

APPLICATION FILED FEB. 28.1919.

Patented Sept. 9, 1919.

V ARTHUR nnonm cnnmnm rams, OF-PUTEAUXV, FRANCE.

" 11 AUTOMATIC rnnrrniz imaxn.

1,315,572. I Original application filed February 14,

' To al l 'zchom it may ooncerh: Be it known/that 1,. ARTHUR: EDOUARD VCLITIBVIENT PARIS, acitizen ofthe Republic or France, and a resident-of Puteaux, Seme, 5 France, have invented a new and useful Improvement in Automatic Trailer-Brakes, which invention is fully set forthinithe following specification. t

'The present invention relates to improvements in automatic apparatus for braking the wheels of motor-car trailers and the rear carriages of guns shown and described but not specifically claimed in my application Sr. No. 217 ,262, filed Feb. 14, 1918, of which the present application is a division. 7 These improved devices are designed on the one hand to render the brake of the trailer inoperative when it is desired to cause the tractor withits trailer to execute as a whole a rearward movement through a certain distance. These devices are designed. on

V the other hand to enable the brake of the trailer to'be operated by hand if required; the option of operating by hand may be necessary when the tractor and the trailer are to be stopped as a whole on a gradient or or uncoupled state at that moment One constructional form. of the apparatus is illustrated in the accompanying drawings in which- Figure 1 is a side elevation of the general arrangement of a 'wheel brake applied to the'wheeled axle of'a guncarriage and pro- 7 vided with myiimprovementsr 'Fig. 2 is a verticallongitudinal section showing the construction of the device;

. Fig.1?) is a horizontal sectional view on line 3-3; of Fig. 2; and 1" V r v Fig. 4 is a vertical cross-section on line 44: of Fig. 2.

moving as well the yoke which isin a fixed" In 1, F isabrake rod having a piston working in a cylinderB having a conduit connection U 'with a piston cylinder Ap -Flu'id is supplied to the cylinders by a reservoir N. This part of the apparatus cons stltutes in substance the subject-matter of .my application Sr. No. 193,21l, filed Sept. 25,1917. 7

In the drawings, the coupling element carried by the rod D consists of a socket D Specification of Letters Patent. Patented Sept. 9, 1919. 1918, Serial No. 217,262. Divided and this application filed February 28, 1919. Serial No. 279,832. 1 r I in which a hook Y is adapted to move, that is rigidly fixed to the bar Q A recess d of'thesocket D is adapted to be engaged by the lower end of a lever Z movable by means of a buttonholeshaped slot 2 around anaxle 1 carried by the gun carriage trail. This slot 2 is made of such size as to allow the lever Z to rotate, and also to rise slightly therein. 'The lower end of the lever carries an angle pin 2 which normally (that is to say, when the parts are arranged for the automatic operation of the brake) is in engagement with the hook Y of the yoke bar Q By simply raising the lever, the axle pin a can be moved intothe position whereby it is released from. the hook Y and by that movement opens the coupling between the yoke bar Q and the rod D.

The lever thus raised remains, however,

in engagement with the'socket D which is held by the axle pin 2 in guides (i formed on the two sides of the aperture d in the;

socket D the socket, the movement of the said lever from left to right will move the socket D and piston rod D to the left. V

By a movement of the lever in the reverse direction, thesocket D is returned into its original position andby succeeding depression of the lever Z the connection"be' tween the axle pin 2 and'thehook Y is re- 7 established. 7 7

What is claimed is a 1. In brake apparatus for trailers and rear gun carriages wherein the operation of the brake mechanism is. eflected'by movement of a normally restrained iston, the combination of an operating r connected to said piston and provided With a socket member,

a yoke-bar provided with a hook adapted to work in said socket and a lever having longitudinal play on its fulcrum and provided at one end with means for coupling said hook and socket when said lever is at one extremity of its play and for uncoupling saidhook By this guidance of the lever in i While engaging said socket when at the opposite end its play for manually operating said piston.

In brake apparatus for trailers and rear gun carriages wherein the operation of ,the brake mechanism is efi'eetecl by movementoi a normally restrained piston, the

combination of an operating rod connected.

to said piston and having a socket member, a yoke-bar provided with a hook adapted to Work in said socket, and a lever having a Copies of this patent may be obtained for five cents each,

ARTHUR EDOUARD CLEMENT PARIS.

by addressing the Commissioner of Patents.

Washington, D. G. 

